PSA is used for error handling. Before loading the data into BW system. We will move it to PSA. In case of any error occurs here we can correct the error and we can update it to data targets.
DSO is mainly used for data staging. As it is a 2 dimensinal model.
DSO detailed data is maintained where as in Cube summarised data will be maintained. So searching will be quicker and easier while generating reports on CUbes than DSO’s
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